Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a726f8851876e37…

MALICIOUS

PDF

74.1 KB Created: 2021-01-25 16:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7692bc541fca3627aaf2f602651c0ad6 SHA-1: 7f1c6d38c7aa1f82eec57e056563bdc1e9d1b416 SHA-256: 9a726f8851876e372944e19b5f645c89efde8e4608e13a102c0324762eecaa42
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous external URIs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, potentially leveraging embedded JavaScript to download and execute further payloads from the identified URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/123?utm_term=osprey+exos+58+weight+without+lid PDF link annotation
    • https://cdn.sqhk.co/sononipo/ehfghjb/gilogalipelupa.pdfIn PDF document text
    • http://myfoxing.online/tekowosodusetulesefigrpog4.pdfIn PDF document text
    • http://1pokypki.website/spaceflight_simulator_full_version_ios5oeyo.pdfIn PDF document text
    • http://activa-fb.com/73430260260pos03.pdfIn PDF document text
    • http://proflist-briansk.ru/75787731787d3bps.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/5ibLgjC/music_tiles_3_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/ajbhedj/29843059526.pdfIn PDF document text
    • http://edaruzal.xyz/52160442638ci38w.pdfIn PDF document text
    • http://lnstagram-helping.live/99958848430ycu16.pdfIn PDF document text
    • https://cdn.sqhk.co/surudije/53jgljj/little_black_boy_haircuts_for_long_curly_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/5ih6ifX/bonetale_fangame_v2._0._2._1_mod_menu.pdfIn PDF document text
    • http://skidki-day.shop/best_american_ninja_warrior_runskhq0l.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/5ih6ifX/bonetalIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedure/gitufubomebomakafabig.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/xitavevekibobek.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/myfwc_endangered_species_list.pdfIn macro / runtime command snippet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 5620 bytes
SHA-256: e1568c074a0f18ed2723a542029acecfaf36f28f53bcc81c1ce6b384590b3986
font_01_sfnt_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 10244 bytes
SHA-256: f0984823a3588772d1cea73bc7536eed681432de51d6478fe3a15aeb841167fc

Open this report in the interactive analyzer, or submit your own file for analysis.